Measurement Gap Configuration for Bandwidth Part Switching

1. A user equipment (UE), comprising: a transceiver configured to wirelessly communicate with a base station; and a processor communicatively coupled to the transceiver and configured to: determine a first measurement gap configuration for a first bandwidth part (BWP) of a first frequency layer of a carrier supported by a cell that serves the UE and the base station, and a second measurement gap configuration for a second BWP of a second frequency layer of the carrier, wherein the carrier includes both the first BWP and the second BWP for communication between the UE and the base station; determine a third measurement gap configuration for the first BWP and the second BWP, based on the first measurement gap configuration and the second measurement gap configuration, wherein the third measurement gap configuration includes a reporting period for generating a report result about the carrier, wherein the first measurement gap configuration includes a first measurement gap repetition period for the first BWP, the second measurement gap configuration includes a second measurement gap repetition period for the second BWP, and the third measurement gap configuration comprises a third measurement gap repetition period that is selected as a longer measurement gap repetition period of the first measurement gap repetition period and the second measurement gap repetition period; perform a first set of measurements on a reference signal operating in the first BWP based on the third measurement gap configuration starting from a first time instance; switch from the first BWP to the second BWP at a second time instance that occurs after the first time instance; perform a second set of measurements on the reference signal during measurement gaps configured based on the third measurement gap configuration for the second BWP; generate the report result based on a third set of measurements performed during the reporting period, wherein the third set of measurements includes at least the second set of measurements; and transmit the report result to the base station.

2. The UE of claim 1, wherein the reporting period starts from the first time instance, and the third set of measurements includes the first set of measurements on the reference signal; or the reporting period starts from the second time instance, and the report result is generated without the first set of measurements.

3. The UE of claim 2, wherein to generate the report result, the processor is configured to generate the report result based on an average value of the third set of measurements performed during the reporting period.

4. The UE of claim 1, wherein the third measurement gap configuration for the first BWP is same as the first measurement gap configuration, and the third measurement gap configuration for the second BWP is same as the second measurement gap configuration.

5. The UE of claim 1, wherein the third measurement gap configuration includes the third measurement gap repetition period for the first BWP and the second BWP.

6. The UE of claim 1, wherein the first frequency layer is an active frequency layer, and the first set of measurements on the reference signal at the first BWP is measured without being at a measurement gap.

7. The UE of claim 1, wherein switching from the first BWP to the second BWP is triggered by a downlink control information (DCI), a radio resource control (RRC) signaling, an inactivity timer expiration, or a medium access control (MAC) entity upon initiation of random access procedure.

8. The UE of claim 1, wherein the first BWP or the second BWP is an initial BWP, a first active BWP, a default BWP, or a dedicated BWP.

9. The UE of claim 1, wherein the reference signal is a synchronizations block (SSB) including Synchronization Signal based Reference Signal Received Power (SS-RSRP), Synchronization Signal based Reference Signal Received Quality (SS-RSRQ), Synchronization Signal based Signal to Noise and Interference Ratio (SS-SINR), Synchronization Signal based Signal to Noise and Interference Ratio (SS-SINR), or Received (linear) average power of resource elements that carry NR SSB signals and channels (SSB_RP).

10. The UE of claim 1, wherein the cell is a primary cell, a secondary cell, or a primary secondary cell.

11. The UE of claim 1, wherein the reference signal is a first reference signal, the carrier is a first carrier, the report result is a first report result, and the processor is further configured to: perform a fourth set of measurements on a second reference signal at a third frequency layer of a second carrier during measurement gaps configured according to the third measurement gap configuration for the first BWP before switching from the first BWP to the second BWP, wherein the third measurement gap configuration includes the reporting period for generating the first report result about the first carrier, and generating a second report result about the second carrier; perform a fifth set of measurements on the second reference signal at the third frequency layer of the second carrier during measurement gaps configured according to the third measurement gap configuration for the second BWP after switching from the first BWP to the second BWP; and generate the second report result based on the fourth set of measurements and the fifth set of measurements for the second carrier.

12. The UE of claim 1, wherein the first measurement gap repetition period, the second measurement gap repetition period, and the third measurement gap repetition period is 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms.

13. The UE of claim 1, wherein the processor is further configured to receive the third measurement gap configuration from the base station, and determine the third measurement gap configuration based on the received third measurement gap configuration.

14. A method for a user equipment (UE), comprising: determining a first measurement gap configuration for a first bandwidth part (BWP) of a first frequency layer of a carrier over a cell that serves the UE and a base station, and a second measurement gap configuration for a second BWP of a second frequency layer of the carrier over the cell, wherein the carrier includes both the first BWP and the second BWP for communication between the UE and the base station; determining a third measurement gap configuration for the first BWP and the second BWP, based on the first measurement gap configuration and the second measurement gap configuration, wherein the third measurement gap configuration includes a reporting period for generating a report result about the carrier over the cell to be sent to the base station, wherein the first measurement gap configuration includes a first measurement gap repetition period for the first BWP, the second measurement gap configuration includes a second measurement gap repetition period for the second BWP, and the third measurement gap configuration comprises a third measurement gap repetition period that is selected as a longer measurement gap repetition period of the first measurement gap repetition period and the second measurement gap repetition period; performing a first set of measurements on a reference signal at the first BWP based on the third measurement gap configuration starting from a first time instance; switching from the first BWP to the second BWP at a second time instance after the first time instance; performing a second set of measurements on the reference signal during measurement gaps configured according to the third measurement gap configuration for the second BWP; generating the report result based on a third set of measurements performed during the reporting period, wherein the third set of measurements includes at least the second set of measurements; and transmitting the report result to the base station.

15. The method of claim 14, wherein the reporting period starts from the first time instance, and the third set of measurements includes the first set of measurements on the reference signal; or the reporting period starts from the second time instance, and the report result is generated without the first set of measurements.

16. The method of claim 15, wherein to generate the report result, a processor is configured to generate the report result based on an average value of the third set of measurements performed during the reporting period.

17. The method of claim 14, wherein the third measurement gap configuration for the first BWP is same as the first measurement gap configuration, and the third measurement gap configuration for the second BWP is same as the second measurement gap configuration.

18. The method of claim 14, wherein the third measurement gap configuration includes the third measurement gap repetition period for the first BWP and the second BWP.

19. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform operations, the operations comprising: determining a first measurement gap configuration for a first bandwidth part (BWP) of a first frequency layer of a carrier over a cell that serves the UE and a base station, and a second measurement gap configuration for a second BWP of a second frequency layer of the carrier over the cell, wherein the carrier includes both the first BWP and the second BWP for communication between the UE and the base station; determining a third measurement gap configuration for the first BWP and the second BWP, based on the first measurement gap configuration and the second measurement gap configuration, wherein the third measurement gap configuration includes a reporting period for generating a report result about the carrier over the cell to be sent to the base station, wherein the first measurement gap configuration includes a first measurement gap repetition period for the first BWP, the second measurement gap configuration includes a second measurement gap repetition period for the second BWP, and the third measurement gap configuration comprises a third measurement gap repetition period that is selected as a longer measurement gap repetition period of the first measurement gap repetition period and the second measurement gap repetition period; performing a first set of measurements on a reference signal at the first BWP based on the third measurement gap configuration starting from a first time instance; switching from the first BWP to the second BWP at a second time instance after the first time instance; performing a second set of measurements on the reference signal during measurement gaps configured according to the third measurement gap configuration for the second BWP; generating the report result based on a third set of measurements performed during the reporting period, wherein the third set of measurements includes at least the second set of measurements; and transmitting the report result to the base station.

20. The non-transitory computer-readable medium of claim 19, wherein the reporting period starts from the first time instance, and the third set of measurements includes the first set of measurements on the reference signal; or the reporting period starts from the second time instance, and the report result is generated without the first set of measurements.